Question

A body is projected vertically upwards with a velocity ‘u’. It crosses a point in its journey at a height ‘h’ twice, just after 1 and 7 seconds. The value of u in ms–¹ is : ( g = 10 ms–²) 

1) 50

2) 40 

3) 30 

4) 20 

Answer 1

Correct :-(2)

Explanation :-

As the body is projected upwards we can write the equation as